Hvězdička u CVE znamená, že jsem to číslo vytáhl z širšího textu článku. Neukazuju u něj proto KEV, EPSS ani CVSS, a to preventivně, protože článek se na něj mohl jen odkazovat, třeba jako na starší kauzu.
Hackers are actively exploiting a critical vulnerability in the WooCommerce Wholesale Lead Capture premium plugin for WordPress to upload a PHP backdoor. [...]
CVE-2026-27540 * WordPress WooCommerce Wholesale Lead Capture US
China's spy chief identified Anthropic’s Claude Mythos and OpenAI’s GPT-5.5-Cyber as signs of what he called a “disruptive upgrade” in cyber capabilities, increasing the speed and potential weaponization of vulnerability discovery and malware development.
UK and allies provide advice to help organisations and individuals at risk detect and counter the threat from CHOSEN BRICK malware.
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Advisory on CHOSEN BRICK malware, including technical analysis and advice to help individuals and organisations protect themselves.
média GB
Researchers at Hudson Rock found that cybercriminals hijacked HBO Max’s verified Reddit account and used it to run 108 malicious ads over roughly 48 hours. The ads used HBO Max’s trusted corporate account to promote fake AI tools, developer software, and macOS utilities, lowering potential victims’ guards. Some ads directed users to convincing HBO lookalike sites that claimed to offer a native HBO Max app for macOS or a promotional download. But instead of providing an installer, the sites…
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A browser extension called Twitch Enhanced Viewer | JeetBot, available in the official Chrome and Firefox stores, sends users' Twitch OAuth session tokens to a commercial bot service. [...]
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Hackers compromised HBO Max's official Reddit account and used it to push malicious ads that launched ClickFix attacks to infect Windows and macOS devices with information-stealing malware. [...]
The pro-Ukraine hacktivist group Hacking Cat has evolved from carrying out website defacements and data leaks to more sophisticated and destructive attacks on Russian targets, researchers said.
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For the latest discoveries in cyber research for the week of 14th Setpember, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES IDScan.net, a US identity verification provider, has disclosed a data breach after detecting unauthorized access on September 1. Exposed data included names and government identification numbers, while a criminal marketplace advertised a collection containing millions of identity documents, including driver’s licenses, associated with the…
KEV ✓ EPSS 0.99 CVSS 10.0 CVE-2026-67276 CVE-2026-72898 CVE-2026-81963 CVE-2026-85046 CVE-2026-85706 CVE-2026-85880 CVE-2026-86060 Microsoft GitLab MikroTik Anthropic IL
Dnešní Postřehy z bezpečnosti vám nabídnou Strážce internetu, lákavý early access u škodlivých aplikací, phishing, který vidíte jedině vy, tučný balík falešných e-shopů, insecure secure boot, ruské útoky na Signál a řadu dalších postřehů.
Signal CZ
Elastic Security Labs has tracked REF9334, a Brazilian banking malware operation, since May 2025. Its toolkit is called KREMLIN (as named by the malware author, Kr3mlin4rt1st), though nothing about the operation is Russian. Lures impersonate twelve Brazilian banks; error messages and code comments are written in Portuguese, and the operators' Ethereum transactions cluster during São Paulo working hours. Over 15 months and seven campaigns, they built a malicious browser extension that installs…
Threat actors linked to a China-aligned espionage group are exploiting a critical vulnerability (CVE-2026-51990) in Tencent's Sogou Input Method for Windows to deploy the GrayRabbit backdoor. [...]
EPSS 0.01 CVE-2026-51990 Tencent US
A single X DM split into two malware chains: AMOS stealer on Mac, NetSupport Manager on Windows, see the Huntress SOC analyst breakdown.
Google US
Threat actors are exploiting critical and high-severity vulnerabilities in JFrog Artifactory to bypass authentication, gain administrative privileges, and deploy a Rust backdoor on vulnerable self-hosted servers. [...]
Threat actors are abusing trusted AI platforms to host malicious content, poison search results, and trick users into installing malware. Huntress examines campaigns targeting AI users through weaponized Claude Artifacts, shared AI conversations, sponsored search results, and ClickFix-style lures. [...]
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Researchers at Group-IB found that the Android banking Trojan Gigabud can create a separate work profile on an infected phone and run a cloned banking app inside it. The attacker can then carry out fraudulent transactions in the new profile, potentially separating them from signs of malware detected elsewhere on the device. To do this, Gigabud installs Vwork, a malicious version of the legitimate open-source tool Shelter. Shelter normally lets Android users isolate apps or run second copies of…
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Upgraded modular malware observed in attacks on Cisco Firewall Management Center (FMC) devicesCategories: Threat ResearchTags: Cyclops Blink, Cisco, Linux
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A new Android malware strain called Mantax Otax combines ransomware and spyware capabilities to encrypt files, steal sensitive data, and spam and harass victims. [...]
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Welcome to this week’s edition of the Threat Source newsletter. Ask anybody in this industry what the work does to the health of the people who do it and you get one word back: burnout. It's a fine word, in and of itself. It’s easy to reach for, understandable to everyone… and it's the wrong one, most of the time. So, story time. Last year I gave an interview with the amazing Hazel Burton about VPNFilter, and my run-in with burnout. I was a manager during that time, and it took a toll on me and…
KEV ✓ · ransomware EPSS 0.89 CVSS 10.0 CVE-2026-20079 CVE-2026-20316 Cisco US
Every wave of technology excitement creates a new opportunity for cyberattackers, and AI is no exception. Microsoft Threat Intelligence has published research showing a growing set of campaigns that impersonate popular AI platforms and tools, including ChatGPT, Microsoft Copilot, DeepSeek, and Claude.1 The goal is to make phishing, search-driven malware campaigns, and malvertising—which is malicious advertising that uses online ads to lure users to harmful sites, downloads, or redirect…
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BlueMoon, a shared Chrome and Windows exploit kit, shows why “patch later” is becoming a dangerous gamble. Security updates are easy to put off. The browser still opens, Windows still works, and choosing to relaunch your browser or restart your computer later can feel harmless. But a newly documented exploit kit called “BlueMoon” shows how quickly patching delays can become dangerous. Proofpoint Researchers found four espionage groups using the same exploit chain against Chrome browsers running…
FortiGuard Labs examines how a new Casbaneiro campaign targeting Latin America uses geofencing and distributed servers to evade analysis and detection
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[This is a Guest Diary by Aaron Ng, an ISC intern as part of the SANS.edu BACS program] Following a RedTail Linux Payload from DShield to Dynamic Analysis During monitoring of my DShield honeypot, I observed an attacker uploading a collection of Linux executables targeting several processor architectures. The files included ARM, ARM64, i686, RISC-V and x86-64 variants named as part of a RedTail deployment package. Rather than relying only on static indicators or public threat-intelligence…
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LLM-based code scanners won’t help attackers build a nuclear weapon, but that refusal could work in their favor
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Threat actors are exploiting GTA6 hype with fake leaked downloads spread via SEO poisoning, packed with RATs, infostealers, and wiper ransomware. Here’s what Huntress found.
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See how a browser-in-the-browser phishing attack led to rogue ScreenConnect persistence and evasion tactics Huntress caught in the act.
An investigation into how cybercriminals used YouTube gaming lures and SEO poisoning to deliver multi-payload malware to enterprise networks. The post Untracked Nightmares: The Threats Hiding Behind Commodity Infrastructure appeared first on Unit 42.
YouTube US
How the Gigabud Android banking trojan abuses Shelter, an open-source app cloner, and what that means for banks, users, and defenders.
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Classification: Critical, Solution: Official Fix, Exploit Maturity: High, CVSSv3.1: 10.0, CVEs: CVE-2026-75650, Summary: Adobe has released a security update for Adobe Commerce and Magento Open Source. This update resolves a critical vulnerability that could result in arbitrary code execution. Adobe is aware of CVE-2026-75650 being exploited in the wild. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS:3.1 10.0
KEV ✓ EPSS 0.04 CVSS 10.0 CVE-2026-75650 Adobe Magento obchod FI US IT FR
A Linux rootkit targeting devices in F5 BIG-IP APM environments can intercept PHP file loading and inject a fileless web shell directly into memory, avoiding the need to write malicious code to disk. [...]
KEV ✓ EPSS 0.02 CVE-2025-53521 F5 US FR
We detected XCSSET malware inside a compromised Flutter package on pub.dev. Here is a full breakdown of the infection chain, propagation modules, and stealer logic we found inside. Category: Vulnerabilities & Threats
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Executive Summary Since the release of our May 2026 report detailing adversarial misuse of artificial intelligence (AI), Google Threat Intelligence Group (GTIG) has observed forward leaning adversaries transition from basic prompting to agentic AI workflows and AI-enabled automation. In these operations, human-in-the-loop latency is dramatically reduced, compressing the traditional window for defenders to respond. In Q2 2026, GTIG observed threat actors compromise a cloud resource, then plan,…
PyPI npm Docker GitHub zdravotnictví veřejná správa média US
Cisco Talos began an investigation after observing a DLL named "verification.google" executing from WebDAV at a Ukrainian government organization. We assess with moderate confidence that the attacks are not targeted at a particular organization, but are a part of a cryptocurrency and credentials-stealing operation using the Amatera stealer as the primary payload. Pivoting around the similar WebDAV behavior led to a second loader named "pf.ch" and allowed us to reconstruct its earlier delivery…
Cisco Talos is tracking a cryptocurrency-stealing campaign that abuses the Google Visualization API for command and control (C2), retrieving obfuscated JavaScript from a publicly published Google Sheets document and injecting it into the victim's browser session. The actors use a variation on ClickFix social engineering. Instead of convincing targets to run commands against the operating system, they convince targets to paste JavaScript into the Chrome address bar or install it into the…
A zero-day vulnerability dubbed "StyleSmuggler" affecting all versions of Magento and Adobe Commerce is being exploited in attacks to deploy a backdoor. [...]
For the latest discoveries in cyber research for the week of 7th Setpember, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES Thomson Reuters, a global information and technology company, has disclosed a breach of its C-Track court case-management platform affecting courts across 11 US states and Canada. An unauthorized party obtained C-Track files containing court records, including names and other personal information. Hit, a major Slovenian gambling and tourism…
KEV ✓ EPSS 0.14 CVSS 10.0 CVE-2026-82329 CVE-2026-83548 CVE-2026-83549 Thomson Reuters Dropbox SonicWall JFrog IL
A known Shai-Hulud worm payload sat dormant for 111 days, then republished to npm, right past the malware scanning meant to catch it. Category: Research
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<p>Sophos X-Ops takes a deep dive into an insidious piece of malware</p>Categories: Threat ResearchTags: rootkit, php, webshell
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A massive cybercriminal operation is leveraging thousands of compromised small-business websites to deliver ClickFix payloads stored in smart contracts on the BNB Smart Chain (BSC). [...]
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OverviewA new Linux toolkit, identified by Rapid7 Labs, has been targeting organizations across South Korea’s automotive and media industries with minimal detection. The campaign made use of a HAProxy instance named “ted backdoor”, alongside trojanized versions of crond, agetty, atd, sshd, and polkitd. This previously undocumented framework enabled threat actors to execute remote commands on compromised servers, inject malicious scripts into web traffic, perform credential harvesting, and…
Introduction We continue tracking the activity of Toy Ghouls (also known as Bearlyfy, Laboo.boo, and Feral Wolf), a financially motivated group that has been targeting Russian organizations since 2025. The attackers initially relied exclusively on tools pulled from public GitHub repositories along with leaked Babuk and LockBit ransomware builders, later shifting to their own custom ransomware, GenieLocker. In early July 2026, we observed the group using a custom backdoor for the first time. We…
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“Free” movies and TV could cost you your privacy, bandwidth, and control of your home network. We’ve warned about illegal streaming and modded Amazon Fire TV Sticks in the past. Now, researchers have found that certain SuperBox devices and apps could quietly enroll a household connection into a proxy network, allowing third parties to route traffic through it. An earlier report identified CyberFlix TV, available through SuperBox’s custom app store, as containing Popanet proxy functionality that…
SuperBox US
Attackers compromised Coder's Cloudflare infrastructure and added unauthorized registry servers that delivered malicious Terraform modules containing credential-stealing code. [...]
A malicious advertising campaign promoting a fake free TV-streaming service reached roughly 570,000 Meta users. The researchers who discovered the campaign found that its streaming-themed ads were aimed at Spanish-speaking users, with most observed victims located in Spain. One Meta campaign ran from June 11 through July 3, 2026, and the same banners were also used to distribute the malware through TikTok. The available data shows the ads’ reach, not the number of downloads or infections, but…
A recently patched critical vulnerability (CVE-2026-32475) in the Elementor Pro plugin for WordPress is being exploited in attacks that deliver a webshell payload and execute arbitrary commands on the server. [...]
EPSS 0.02 CVE-2026-32475 WordPress Elementor US
Infostealers can expose far more than passwords, including authenticated sessions that may let attackers bypass MFA. Flare explains how defenders can prioritize compromised identities, determine whether stolen access is still usable, and respond before it leads to account takeover. [...]
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A Nemzetbiztonsági Szakszolgálat Nemzeti Kiberbiztonsági Intézet (NBSZ NKI) riasztást ad ki Magyarország Ügyészségének nevével és arculati elemeivel visszaélő, zsarolóvírus fertőzéshez vezető adathalász üzenetekről. A bejelentések alapján a támadók hamis, hivatalos megkeresés látszatát keltő leveleket küldenek, amelyekben ügyészségi alkalmazottak nevével élnek vissza. A kampány célja az, hogy a felhasználó a levélben szereplő hivatkozásra kattintson, majd a […]
Huntress is tracking a pattern across multiple customer environments where rogue ScreenConnect clients repeatedly spawn the Windows Script Host to execute a series of four VBScript files.
In this article Risk to enterprise environmentsAttack chain overviewMitigation and response recommendationsLearn more Microsoft Threat Intelligence has observed a human-operated intrusion campaign that abuses Microsoft Teams external collaboration to impersonate IT or helpdesk personnel and socially engineer users into granting an interactive remote session. Once remote control is established via RMM tools, the threat actor uses PowerShell to download and silently install a malicious MSI…
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Searzhudin Tamirlanovich Aktulaev appeared in a San Francisco federal court on Monday after being arrested in Cyprus in May 2025 and extradited to the U.S. last week.
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The group, which calls itself VantaCore, has targeted at least seven known victims, Russian cybersecurity firm F6 said in a report published this week.
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U.S. and European authorities disrupted the long-running botnet Sality, turning the malware’s peer-to-peer architecture against itself to cut thousands of infected computers off from operators.
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Research by: Amit Yardeni Key Points A Chinese-speaking actor is now targeting Brazil. Check Point Research has uncovered a sustained campaign against Brazilian organizations, primarily government and educational institutions since mid-2025. We dubbed this group Gambling Goblin: a Chinese-speaking cybercrime cluster connected to a previously documented group, Earth Berberoka, that targeted gambling sites across Asia. It marks a shift from Brazil’s usual home-grown banking-trojan threats to a…
A California federal grand jury has indicted a Russian national for his role in a phishing campaign that infected thousands of freelancers with TVRAT and DarkVNC malware. [...]
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International law enforcement agencies and private partners have seized Sality malware infrastructure in a joint action aiming to disrupt and take down the peer-to-peer (P2P) botnet. [...]
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Elastic Security Labs is tracking an emerging infostealer, REVSTEALER, under REF2859. This family has gained momentum in recent months, with higher distribution volume, and has emerged as a formidable threat, featuring a comprehensive credential harvester, an embedded sandbox scoring system, and a Polygon blockchain-based dead drop for resilience. Beyond credential theft, REVSTEALER targets gaming platforms for additional monetization; the developer clearly understands that victim accounts on…
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In this article Attack chain overviewCampaign scope and targetingMitigation and protection guidanceReferencesLearn more Microsoft Defender Experts is tracking an active malware campaign that uses counterfeit software-download websites to impersonate trusted vendors and distribute malicious installers. The campaign has targeted users looking to download popular software and has resulted in compromises across multiple organizations and industries, primarily affecting China-based operations of…
We’ve seen scam sites built around Grand Theft Auto VI (GTA 6) targeting visitors in three different ways this year. In June, we looked at sites selling GTA 6 “early access” for hundreds of dollars in cryptocurrency. You paid, got nothing, and could not reverse the payment. In August, we found fake Extended Look and demo sites delivering an infostealer instead of a game. The site we examined this week looks like a GTA 6 fan countdown site but offers to sell a leaked copy of the game. It loads a…
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